Improvement in hulls of vessels



geen @time hull.

LEMAN B RIDER, or rlr'rssuite, PENNSYLVANIA, AssieNos r ro HiMsELF,

WILLIAM YAeLn, AND A, y

WARD, or sAME PLAGE.

Letters Patent No. 107,961, dated October 4, 1870.

, l IMPROVEMENTIN HuLLs QF vEssELs.

.t The` Schedule referred td in these Letters Patent and making part of the same `To Il whomt't may concern:

f Beit kuowii thatd, LEMAN-P; RIDER, ol' Pittsburg, iii the county of Allegheny and State ot'- 'Penn-V 1 syl'vani'a, have invented `a new and useful Improvel ment in Boat-Hulls; and Ido hereby declare that the following is a full, clear, and exact description thereof', which will enable others 'skilled inthe art to make and use the same, reference being liad to the accompanying drawing forming part ot' this specitcation.` 4

My invention relates to the construction of the hulls of ships, boats, or vessels; and I `it/Iyvobject is to cause the liquid displaced by the cut-water to be gathered convergiuglyunder the4 center of tlie boat, and to be `thence divcrgiiigly passed 'overat the stern, in order to retain `the boat in a liorizonlal position, and thereby facilitate its motion throughwthe water.

Figures 1 and 2 are cross-sections of the hull upon` .a central plane, showing modicatioiis, yone with straight and the other with curved incliiies.

, 'Figure 3 is a side view. t

.Figurcs4 and 5 are plan views.

Figure 6 isa perspective view of thebot'toiri of' the Figure 7 isau end view.` n

A in fig. l'represeii'ts the transverse 'angle-at the center, while t t B, iig. 2, represents a curve, forming an are instead ofan angle;

C, iig. 6,.i s the cut-water, and l) is a 'reversed counterpart thereof a-t `the stei'n.

waterends, (and ceases to displace-.tile water,) and terminating where the couiiterpartbegiiis to separate the volume ot' water from the central chamber. 'llie opposite sides of chamber-E incline, gradually attain- `,ing their maximum atthe center, where the deptlr` `also is greatest.- t

4 Tliefinode of operation is as follows: i

The volume of water displaced by the inclined sides of the cut-water is converged, as the boa-t moves along,

by the reversely-inclined'sides of chamber E, until i first by a very obtuse angle, o r the arc ot avery large circle, which gradually becomes more and more acute or diminished. l The volume ot' water-displaced being converged by the gradually-converging sides of chamber E, to quickly fill up the trough iliade bythe cut-water, a firni support is furnished to t-lie boat in the line of its cen. ter of gravity, which rendei'st steady and unwavering in its position.

Au upward pressure being produced at the stern, in passing over the volunie ot' waterfrom chamber E equal to the upward pressure of, .the 'water upon' the moving sides of the cut-water, there is iio tendency g ofthe boat'to rock on thecenter, and to be raised higher at the'prow than at the stern.. The boat thus Y sits equabiy, and iii a horizontal plane upon the water,

land rides liuoyantly atany speed whicli'inaybe given. n

lIn all well-proportioned boats, constructed on any other principle, the pressure of' water upon theiiiclined sides 'of the cut-water throw up the prowiaiid Y down the stern. -The incline thus formed, however small, causes the boat to be propelled up h ill, Vinstead ofen a-constant level. Under these/circumstances. the vpower is compelled to lift a considerable percentage of the weight, as well as to carry it forward.

:Having 'thus described all that isV necessary to a full understanding of my'invention, E is a central chamber, commencing whei'eSt-he'cut- What I'esteern as new, and desire to protect by The cut-water C and'. its reversed counterpart D, combined with central chamber E, as and for the purpose described.

. l LEMAN P. RIDER. Witnesses: i i

I H. HILLnnMAN,v O. H. Lovs. 

